Koroivos
{{Infobox Greek Dimos
|name = Koroivos
|name_local = Κόροιβος
|type = community
|periph = West Greece
|periphunit = Elis
|municipality = Pineios
|municunit = Gastouni
|pop_community = 339
|population_as_of = 2021
|area =
|coordinates = {{coord|37|52|N|21|18|E|format=dms|display=inline,title}}
|postal_code = 273 00
|area_code = 026230
|licence =
|website =
|image_skyline =
|caption_skyline =
|city_flag =
|city_seal =
|elevation = 10
}}
Koroivos ({{langx|el|Κόροιβος}}, before 1955: Κελεβή - Kelevi[http://pandektis.ekt.gr/pandektis/handle/10442/169550 Name changes of settlements in Greece]) is a village in the municipal unit of Gastouni, Elis, Greece. It is situated in a flat rural area, south of the river Pineios. It is 2 km southeast of Lefkochori, 2 km west of Roupaki, 2 km southwest of Agia Mavra and 4 km east of Gastouni. The village was named after Coroebus of Elis, one of the winners of the first Ancient Olympic Games.Today, there is a Cultural Center in the village, while only a kindergarten is open, since the primary school was closed due to lack of children. In the center of the village dominates the temple of Agia Paraskevi, as well as the large square. The small church of the village cemetery, which is preserved to this day, dates from the era of Ottoman rule. The main activity and source of income for the inhabitants of Koroivos is agriculture and animal husbandry.
| class=wikitable
! Year !! Population | |
| ----
| 1981 | 369 |
| ----
| 1991 | 377 |
| ----
| 2001 | 363 |
| ----
| 2011 | 316 |
| ----
| 2021 | 339 |